For most Sydney homes, once a year. For monitored systems, commercial sites and anything over ten years old, every six months is the better interval.
That is the short version. The longer answer is that alarm service frequency is really a question about what degrades on its own, and the honest list is shorter than most people expect. Batteries, sensors that drift out of position, and a communication path that can stop working without making a sound. Everything else tends to either work or fail obviously.
Quick answer
- Home, unmonitored, under 10 years old: every 12 months
- Home, monitored: every 12 months, with a monitoring path test at each visit
- Business or commercial site: every 6 months
- Any system over 10 years old: every 6 months
- Panel backup battery: replaced every 3 to 5 years regardless of how the system is behaving
- Always, outside the schedule: after a renovation, a break-in, a new pet, a tenancy change, or a power surge
What the Australian Standard Actually Says
Intruder alarm systems in Australia are covered by AS/NZS 2201.1, the standard for client premises alarm systems. It separates maintenance into routine maintenance and emergency maintenance, sets requirements for standby battery capacity and automatic battery testing, and requires that maintenance records be kept.
What it does not do is publish a single service interval that applies to every property, and anyone who tells you the standard mandates a specific number is overstating it. The intervals in this guide are practical ones, based on what actually fails and how quickly.
The NSW EPA takes a similar line from the noise side. Its guidance to alarm owners is to keep the alarm properly maintained, precisely because a neglected alarm is the one that sounds for too long and attracts a complaint.
Alarm Service Frequency by Property and System Type
| Situation | Service interval | Why |
|---|---|---|
| Home, unmonitored, under 10 years old | 12 months | Battery and sensor check is most of the work |
| Home, monitored | 12 months | The reporting path has to be tested, not assumed |
| Business, retail, warehouse or office | 6 months | More zones, more staff, more arming cycles, more wear |
| Any system over 10 years old | 6 months | Sensors become erratic late in life, often one at a time |
| Wireless or hybrid system | 12 months | Sensor batteries and signal strength are checked as a set |
| Holiday house or vacant property | 12 months, plus a test before each stay | Nobody is there to notice a fault between visits |
| After a renovation, break-in or tenancy change | Straight away | The building or the users changed, so the programming no longer matches |
What Actually Degrades Between Services
The panel backup battery. This is the one with a genuine shelf life. A sealed lead-acid battery in an alarm panel is generally replaced every 3 to 5 years, depending on temperature and how often it has had to discharge. A tired battery shows up as trouble beeps, or as a system that drops out the moment mains power goes. If yours has never been replaced and the system is older than five years, that is the first thing to deal with.
Wireless sensor batteries. Each one lasts a few years, and the panel reports them individually, so these are usually caught between services rather than at one.
Sensor alignment and placement. Doors swell and drop on their hinges, reed switches drift out of the magnetic gap, and motion detectors get knocked, painted around or blocked by a new shelf, heater or pot plant. Nothing fails; it just stops covering what it used to.
The siren. Sirens lose volume slowly, which is almost impossible to notice by ear across a year. They are tested at a service because nobody can judge it from memory.
The reporting path. On a monitored system, this is the quiet one. The alarm can keep working perfectly on site while its ability to tell anyone has stopped. The 3G shutdown in October 2024 left a lot of systems in exactly this state, and many owners still do not know. If yours used to send messages and stopped, see upgrading an existing alarm.
Programming drift. Codes for people who have moved out, zones isolated during a renovation and never re-enabled, entry delays that no longer match how the household uses the door. None of this looks like a fault. It just quietly reduces what the system covers.
What a Proper Alarm Service Includes
A service visit is not a quick look at the keypad. A thorough one covers:
- Read the event log and look for repeat patterns since the last visit
- Walk test every zone, confirming each one reports the right zone name at the panel
- Load test the panel backup battery, and replace it if it is at or past the 3 to 5 year mark
- Check every sensor for alignment, mounting, lens condition and anything new in its field of view
- Test the internal and external sirens for volume and cut-off timing
- Check and clean detector lenses, a common cause of false alarms
- Test the reporting path end to end, with the monitoring centre on the line if the system is monitored
- Review user codes, remove codes for people who have left, and re-enable any isolated zones
- Check the app connection and push notifications if the system has them
- Leave a written record of what was tested, what was changed and what to watch
That last point matters more than it sounds. A service with no record is impossible to audit later, and on a commercial site it is usually the thing an insurer or auditor asks for.
When was your alarm last serviced?
If the answer is “no idea”, it is almost certainly overdue. We will test every zone, the battery, the siren and the reporting path, and leave you a written record. Call 1300 029 999.
The Monthly Test You Can Do Yourself
An annual service does not mean twelve months of no attention. A two-minute check each month catches most problems long before they matter.
- Arm the system and walk past one sensor. Rotate which one you test each month, so every zone gets checked across the year.
- Check the keypad for trouble or battery lights before you disarm. Anything lit is worth a photo.o
- If the system is monitored, ring the centre first and ask to be put on test, then ring again when you have finished.
That third step is not optional. An untested activation on a monitored system can send a patrol, and patrol attendances are usually chargeable. See back-to-base monitoring for how the response plan works.
Signs You Are Overdue
- The keypad beeps intermittently, or a trouble light has been on for weeks
- The system drops out or resets when the power flickers
- A zone has been isolated or bypassed, and nobody remembers why
- The alarm has gone off for no clear reason more than once
- It used to send you messages or report to a monitoring centre and no longer does
- Someone with a code no longer lives or works at the property
- You cannot remember the last service, and there is no paperwork for one
The last one is the most common answer we get, and it usually means several years.
Insurance, Leases and Commercial Obligations
For homes, a serviced alarm is rarely a policy condition, though some insurers consider a monitored system when pricing.
Business is different. Commercial policies, and some leases, can carry conditions about the alarm being maintained and operational, and a landlord or an auditor may ask for service records. The wording varies between insurers, so the practical advice is to read your own policy schedule rather than assume. If there is a condition, it is almost always satisfied by a regular service with a written record, which is the same thing you should be doing anyway.
What an Alarm Service Costs
Typical Sydney ranges in 2026, including GST. The figure is confirmed once we know the panel and the number of zones.
| Service | Typical range (inc. GST) | Notes |
|---|---|---|
| Annual home alarm service | $200 to $350 | Full zone test, battery test, siren and reporting check |
| Backup battery replacement | $150 to $250 | Often done at the same visit, every 3 to 5 years |
| Commercial service, per visit | $250 to $600 | Driven by zone count and site access |
| Replacing a faulty sensor found at service | $120 to $300 per device | Sensor type and cabling access |
For context, a new alarm system starts from around $900 installed and climbs from there. An annual service costs a fraction of that, and its main job is making sure you do not pay for a new system earlier than you need to. Our security system servicing and repairs page covers what we cover across alarms, cameras, intercoms and access control.
Frequently Asked Questions
How often should a home alarm system be serviced?
Once every 12 months for most Sydney homes, and every 6 months if the system is more than ten years old. Book sooner than the schedule after a renovation, a break-in or a tenancy change.
How long does an alarm backup battery last?
Generally 3 to 5 years. It is replaced on that schedule rather than waiting for it to fail, because the failure usually shows up at the worst moment, during a power cut.
Does an alarm need servicing if nothing is wrong with it?
Yes, and that is the point. The failures that matter most are the silent ones: a flat backup battery, a siren that has lost volume, or a reporting path that stopped working. None of them announces themselves.
Can I service the alarm myself?
You can do a useful monthly test: arm the system, walk one zone, and check the keypad for trouble lights. Load testing the battery, testing siren output and testing the reporting path need a technician and, on a monitored system, coordination with the monitoring centre.
Will servicing my alarm stop false alarms?
It prevents many of them, because cleaning lenses, realigning contacts and replacing tired batteries removes the most common causes. A system already going off repeatedly needs fault diagnosis first rather than a routine service.
Book an alarm service.ce
Every zone walk tested, the battery load tested, the siren and the reporting path checked, and a written record of what we found. Alarm servicing across Sydney on all major brands.
